there was a shootout in watertown. >> reporter: his older brother tamerlan tsarnaev also wanted from the fbi died sunday morning with a shootout with police. authorities say the brothers may have been planning another attack. >> i told the people of boston they can rest easily. the two people that were completing these vicious attacks are dead or arrested. >> reporter: the threat may be over but the grieving and healing have only just begun. and on that note, there will be a moment of silence at 2:50 eastern this afternoon. that is exactly one week after the boston marathon bombings took place. after that bells will ring here in the region to honor those that have lost their lives as well as those in the hospital. the latest numbers on that front more than 50 victims remain in the hospital and three of them are in critical condition. >> reporter tori dunan live from boston. thank you. >>> the oakland a's are in boston. they are getting ready to begin a series with the boston red sox. two a's players and head coach plan to meet with young aaron hen. he suffered a very serious leg inju